== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:35:16 (1787855716)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.9723 s, 7.0 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
llite.lustre-ffff96a882bd5800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.389922
Iter 1/10: OSS cache speed: 0.442812
Iter 1/10: ladvise speed: 0.368901
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.327908
Iter 2/10: OSS cache speed: 0.35756
Iter 2/10: ladvise speed: 0.430874
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.32229
Iter 3/10: OSS cache speed: 0.360473
Iter 3/10: ladvise speed: 0.360485
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.375113
Iter 4/10: OSS cache speed: 0.330515
Iter 4/10: ladvise speed: 0.365359
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.383511
Iter 5/10: OSS cache speed: 0.3795
Iter 5/10: ladvise speed: 0.391021
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.34856
Iter 6/10: OSS cache speed: 0.361517
Iter 6/10: ladvise speed: 0.341616
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.313509
Iter 7/10: OSS cache speed: 0.384214
Iter 7/10: ladvise speed: 0.339376
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.411594
Iter 8/10: OSS cache speed: 0.393261
Iter 8/10: ladvise speed: 0.357925
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.392295
Iter 9/10: OSS cache speed: 0.482508
Iter 9/10: ladvise speed: 0.386993
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.385141
Iter 10/10: OSS cache speed: 0.349644
Iter 10/10: ladvise speed: 0.424764
Average uncached read: .36
Average speedup with OSS cached read:  .38 = +5%
Average speedup with ladvise willread:  .37 = +2%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0